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NPA: 443 [Rate centres in NPA 443] [Dial plan for NPA 443]

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NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-776 2 Elkridge MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2014-09-27   
443-776 3 Elkridge MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2014-07-31   
443-776 4 Elkridge MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2014-09-27   
443-776 5 Elkridge MD BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2015-01-28   
443-776 6 Elkridge MD BLTMMDCH25Z  8697 BALTIMORE-WASHINGTON TELEPHONE (BWT) 238   2015-06-11   
443-776 7 Elkridge MD BLTMMDDN2MD  508J CENTURYLINK COMMUNICATIONS, LLC 238   2014-06-25   
443-776 8 Elkridge MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2015-07-04   
443-776 9 Elkridge MD   515J IP HORIZON LLC 238   2015-03-23   
443-777 A Essex MD ESSXMDEXRP0  9212 VERIZON MARYLAND, INC. 238      
443-777 0 Essex MD BLTMMDCHX7X  073H TELNYX LLC 238   2017-03-14   
443-777 1 Essex MD ESSXMDEXRP0  9212 VERIZON MARYLAND, INC. 238      
443-777 2 Essex MD ESSXMDEXRP0  9212 VERIZON MARYLAND, INC. 238      
443-777 3 Essex MD ESSXMDEXRP0  9212 VERIZON MARYLAND, INC. 238      
443-777 4 Essex MD ESSXMDEXRP0  9212 VERIZON MARYLAND, INC. 238      
443-777 5 Essex MD ESSXMDEXRP0  9212 VERIZON MARYLAND, INC. 238      
443-777 6 Essex MD ESSXMDEXRP0  9212 VERIZON MARYLAND, INC. 238      
443-777 7 Essex MD ESSXMDEXRP0  9212 VERIZON MARYLAND, INC. 238      
443-777 8 Essex MD ESSXMDEXRP0  9212 VERIZON MARYLAND, INC. 238      
443-777 9 Essex MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-04-30   
443-778 A Waterloo (Washington DC LATA) MD LARLMDLRDS0  9212 VERIZON MARYLAND, INC. 236      
443-778 0 Waterloo (Washington DC LATA) MD LARLMDLRDS0  9212 VERIZON MARYLAND, INC. 236      
443-778 1 Waterloo (Washington DC LATA) MD LARLMDLRDS0  9212 VERIZON MARYLAND, INC. 236   2002-06-25   
443-778 2 Waterloo (Washington DC LATA) MD LARLMDLRDS0  9212 VERIZON MARYLAND, INC. 236   2003-02-15   
443-778 3 Waterloo (Washington DC LATA) MD LARLMDLRDS0  9212 VERIZON MARYLAND, INC. 236      
443-778 4 Waterloo (Washington DC LATA) MD LARLMDLRDS0  9212 VERIZON MARYLAND, INC. 236      
443-778 5 Waterloo (Washington DC LATA) MD LARLMDLRDS0  9212 VERIZON MARYLAND, INC. 236      
443-778 6 Waterloo (Washington DC LATA) MD LARLMDLRDS0  9212 VERIZON MARYLAND, INC. 236      
443-778 7 Waterloo (Washington DC LATA) MD LARLMDLRDS0  9212 VERIZON MARYLAND, INC. 236      
443-778 8 Waterloo (Washington DC LATA) MD LARLMDLRDS0  9212 VERIZON MARYLAND, INC. 236      
443-778 9 Waterloo (Washington DC LATA) MD LARLMDLRDS0  9212 VERIZON MARYLAND, INC. 236   2003-02-15   
443-779 A Aberdeen MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
443-779 0 Aberdeen MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2016-02-06   
443-779 1 Aberdeen MD   145J TERRA NOVA TELECOM INC. 236   2024-07-16   
443-779 2 Aberdeen MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2010-10-20   
443-779 3 Aberdeen MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2010-10-20   
443-779 4 Aberdeen MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2010-10-20   
443-779 5 Aberdeen MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2010-10-20   
443-779 6 Aberdeen MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2010-10-20   
443-779 7 Aberdeen MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2010-10-20   
443-779 8 Aberdeen MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2010-10-20   
443-779 9 Aberdeen MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2013-12-27   
443-780 A Woodlawn MD PIVLMDPKXEX  829J PAETEC ITEL, LLC 238   2025-04-01   
443-780 0 Woodlawn MD PIVLMDPKXEX  829J PAETEC ITEL, LLC 238      
443-780 1 Woodlawn MD PIVLMDPKXEX  829J PAETEC ITEL, LLC 238      
443-780 2 Woodlawn MD PIVLMDPKXEX  829J PAETEC ITEL, LLC 238      
443-780 3 Woodlawn MD PIVLMDPKXEX  829J PAETEC ITEL, LLC 238      
443-780 4 Woodlawn MD CLMAMDORAMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2017-11-24   
443-780 5 Woodlawn MD CLMAMDORAMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2017-11-24   
443-780 6 Woodlawn MD CLMAMDORAMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2019-06-21   
443-780 7 Woodlawn MD BLTQMD012MD  964H BARR TELL USA, INC. 238   2016-12-17   

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Last updated: Tue, 29 Sep 2026 03:00:13 UTC

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